This has a diagonal of 14.3in, so a 14in screen would be closest to life size. They are exactly what you want, except for their screen sizes.įor your purposes, the best screen size would be 210 x 297mm, which is the same as A4 paper. They don’t require much battery power, so they can run for many hours between charges. They have E-Ink screens that – unlike laptop screens – are readable outside. Mass market e-readers such as Amazon Kindles are designed to replace printed books, so they tend to be around the size of a novel, only thinner. Screen mattersĪn e-ink screen doesn’t emit its own light and is easily readable outdoors.

Even if you’re a student and not earning anything, you can still value your time. When people are earning £25,000 to £250,000 a year, it’s generally easy to demonstrate the economic value of expensive devices.

I compare this against the cost of labour (salary plus overheads), and calculate benefits such as time savings and the ability to work when it would otherwise be impossible. I calculate the number of hours of use per week, and the number of years of use, to get a cost-per-hour. If you are buying something for business purposes, reconsider your approach to pricing. As a result, they will be relatively expensive.

However, dedicated devices need to outperform general-purpose devices to find a market, and they will still sell in much lower volumes. In this case, you seem to want a dedicated device, where the extra features of, say, convertibles running Microsoft Windows 10 are more of a drawback than a benefit. A smartphone is not the best camera, notebook, word processor, audio recorder, radio, MP3 player, map reader, pedometer and so on, but it is good enough replace numerous separate devices for most people most of the time. Your challenge is to balance things like text clarity, screen size, portability, battery life, ease of use, versatility and price to arrive at the best choice for your personal needs.

Pdf reader portable